Can-bottom



z vsheets-sheet 2.

(No Model.)

J. R. MGL'AUGHLIN.

GAN BOTTOM.

No. 547,225. Pat-entedot.- 1, 1895.

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ANDREW B GRAHAM.PMHULPIMCLWASHINGTON4 D C.

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Ariana* JAMES R. MCLAUGHLIN, OF CLIFTON SPRINGS, NEV YORK.

CAN-BOTTOM.

ECIFICATION forming part of Letters Patent No. 547,225, dated October 1,1895.

Application filed June 25, 1895. Serial No, 553,941. (No model.)

.To all whom it may concern:

Be it known that I, JAMES R. MOLAUGHLIN, of Clifton Springs, county ofOntario, State of New York, have invented certain new and usefulImprovements in Bottoms for Open- Topped Metallic Vessels, of which thefollowing is a specification.

My invention relates to double bottoms for pails and other opentoppedmetal articles to prevent the rusting of the same, and the object I haveview is to provide a double bottom, in which the upper or anti-rustplate is arranged to prevent the contact of the liquid in the vesselwith the lower plate and at the same time is entirely independent of thesame, and hence removable at any time when worn with out disturbing thelower plate or bottom proper of the pail.

A further object is to provide an anti-rust or second bottom adapted tobe secured at its edges only in the bottom of the pail after it has beencompleted.

My invention consists generally in the constructions and combinationshereinafter described, and particularly pointed out in the claims.

`In the accompanying drawings, forming part of this specification,Figure lis a side elevation of a pail embodying my invention, a portionof the side being broken away to show the double bottom. Fig. 2 is asectional view of the lower part of the pail, showing the double bottomin section. Fig. 3 is a similar view, showing a modification of thedouble bottom. Fig. t is a side elevation of a pail, showing anothermodification, the pail being provided with an inwardly-projectingcircumferential rib or shoulder at the point where the upper or falsebottom is secured. Fig. 5 is an enlarged sectional View of the same.

In the drawings, 2 represents the side walls of a tin pail of ordinaryconstruction, having the outwardly-turned flange 3 at its lower end, andprovided with a plate 4, forming the bottom proper, which is preferablyconcave in form, and has its edges bent down and turned out and up overthe flange 3, as shown in Fig. 2. In this position the edges of thebottom plate are rigidly secured to the flange 3 by solder or in anyother suitable way. Above the plate 4, and having its under surfaceresting upon the upper surface of said plate 4, is a second concaveplate 5 of a different kind of metal, preferably zinc, having its edgesin close contact with the inner walls of the vessel. 'lhis zinc plate ispressed down into the pail from the top to a point above the bottomproper of the pail and partially held in this position by its ownpressure against the side walls of the vessel. The edges are then soldered and a water-tight joint formed, which prevents the liquid fromcoming in contact with the lower plate or bottom proper of the pail.

I prefer to use Zinc for the second bottom on account of itsanti-rusting properties, ow'- ing to the chemical action between the tinand zinc, but I do not confine myself to this metal, as any other whichwill prevent the rusting of the sides of the vessel may be used withequally good results. I also prefer to make the two plates forming thebottom concave or dished, as shown in Fig. 2, so that the unequalexpansion of the metal composing the two plates will not tend toseparate them; but, if desired, the bottom may be made perfectly iiat,as shown in Fig. 3, and, while I prefer to place the false bottom inclose contact with the bottom proper of the pail, it may be secured sothat a small space will be provided between the two plates, or so thatthe middle portion of the upper plate will rest upon the lower, whileits edges do not touch the edges of the lower plate.

As shown in Figs. 4- and 5, I may provide the pail or vessel with aninwardly-projecting rib or shoulder extending around the inner surfaceof the vessel near the bottom thereof and at the point where the falsebottom is secured.

The upper plate or false bottom may be placed in position while the pailis in process of manufacture, or after it has been completed, and may beplaced in any sheet-metal pail which it is desired to renderanti-rusting. When the upper plate has become worn, it may be readilyremoved and a new one substituted therefor without in any way damagingthe pail.

Having thus described my invention, I claim as new and desire to secureby Letters Patentum l. An opened top metallic vessel provided with abottom composed of two plates of different kinds of metal, the lowerplate having its outwardly turned edges secured to the outwardly turnededges of the sides of the vessel, the upper plate being of zinc, and inclose proximity to the lower, and having its edges in contact with andsecured to the inner surface of the walls of the vessel, whereby contactof the liquid in the vessel with the lower bottom is prevented, and saidupper plate being removable independently of said lower plate, and bothof said plates being concave, for the purpose set forth.

2. An open topped metallic vessel, substantially cylindrical in form,having a false bottom composed of non-corrosive material, said bottombeing pressed into the vessel above the bottom proper, and being whollyindependent thereof, and therefore removable at will without disturbingsaid bottom proper and partially held within said vessel by its ownpressure against the side walls thereof,

Y and an auxiliary fastening at the edges of said false bottom wherebythe joint is made water tight, for the purpose set forth.

3. In an open topped metallic vessel, the combination, with the sidesthereof, of a bottom composed of two plates of different kinds of metal,the upper plate being of non-corrosive material, and having its edgessecured to the inner surface of the walls of the vessel, whereby a tightjoint is formed to prevent contact of the liquid in the vessel with thelower plate, said lower plate having its edges turned outwardly andupwardly and secured to the outwardly turned edges of the sides of thevessel entirely independent of said upper plate whereby the latter maybe removed from the pail or inserted therein without disturbing saidlower plate, substantially as described.

In testimony whereof I have hereunto set my hand this 21st day of June,A. D. 1895.

.I AMES R. MCLAUGI'ILIN. In presence of- C. G. I-IAWLEY, RICHARD PAUL.

